Design a brief history of a constructed language (conlang) as it evolves over three distinct eras: Era 1 (Isolation), Era 2 (Trade Contact), and Era 3 (Industrialization). For each era, define three specific grammatical rules (e.g., word order, case marking, or verb conjugation). Explain the linguistic mechanisms (e.g., creolization, grammaticalization, or vowel shifts) that caused the transition from Era 1 to Era 2, and from Era 2 to Era 3. Provide example sentences showing how the same phrase is spoken in each era.